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  2. Hi friend, please help me, i want to calculate the COG (center of gravity) every component, and total COG of the model with summary feature (radioss environtment). But, when i used M-ADV1 (distribute mass) and choose the visualization node. but the COG is affected by the placement of visualization node? even though it used distribute mass (M-ADV 1)? is there a way to model the admass that not affected by the placement of visualization node? so we can get "more real" behaviour of distribute mass? I search in this forum, and found same topic, but there is no solution i think i'm sorry for my bad English Thank you before nb: i attached 2 simplify model (radioss 2017 environtment) all same but the placement of visualization node is not in same place. the COG in summary is totally different CENTER VISUALIZATION.hm SIDE VISUALIZATION.hm
  3. Hello again, First of all thank you so much for your quick reply. I have been testing the automatic refinement and I’ve had problems when I used it in assembly. When the mesh is refined it loses the constrains. I think that this happens because the program generates a new mesh and the constrains lose the reference (attached images). Can you refine in a constrain? This don’t happen when I do it in a single piece. According to your answer Alpha. I use mesh controls but these apply at the begin of the study. If I want to refine the mesh once the study is finished, will I have to generate the entire study again? When applying re-mesh, I get quality mesh errors as if its quality was not good. Thanks so much again, Sergi Valdezate
  4. Hi, Can you share the screenshot of same? I hope you have selected the components before clicking apply button. Thank you
  5. Today
  6. After doing the shell mesh of the one big connectedbody, select the mesh body, right-click and choose UNMERGE. You will get the mesh of the original bodies, including the original names.
  7. Dear Mel, Thank you for the information. Really appreciate your assistance. It was helpful. Thank you. Regards, Hamsalekha
  8. The student edition is limited as per the error message. Each configuration, although you set a single frequency, will count as a frequency. Either then split the model into two separate models, or you would have to get access to a full (unlimited) Feko version somewhere. Perhaps your University (lecturer) could provide.
  9. Hi, I wish to write a postfeko code where it can generate only near field results (Electric field magnitude and phase for theta and phi) and far field results (Electric field magnitude and phase for theta and phi and backscattering cross section value) for 256 configurations in one single text file. (Combinations of all 256 configurations in a single text file and also 2D Cartesian graph) I wrote this code (only for near field) but it is not working. The arrangement of the configurations are not in order and the results cannot be displayed in the Cartesian graph. My code -- To get started try the following script: names = pf.NearField.GetNames() printlist(names) for i = 1,256,1 do nearfieldi = pf.NearField.GetDataSet(names) print(nearfieldi) end return nearfield The output file has all the results of 256 configurations but there are other informations as well. So, it is impossible for me to extract the mentioned data one by one for 256 configurations and paste it in text file since its time consuming. The configurations are based on the theta and phi of incident and scattered field. I will attach the output file so that you can take a look on how the initializations are done and you can also refer to my previous forum discussion to understand the flow of the simulation. I hope anyone can assist me in this problem since it is an essential part of the investigation. Thank you output file of feko.txt
  10. You must use double precision - enter the text in the search bar on the top right of cadfeko if you don't know where to enable this. The mesh will look "cubical" if there are not enough triangles around the circumference of the tube. You can also view the mesh in CADFEKO by disabling the Overlay and Model view icons and only enabling the Simulation mesh view icon on the Display options tab. Connectivity can be viewed by clicking the Connectivity icon.
  11. mel

    Error 3978

    en anglais s'il vous plait?
  12. Hi Darad, Regrets for causing inconvenience. There is an issue in the Bolt thread creation. ISSUE: When IPS units is set and in the Bolt thread creation, when the Pitch value is given (say "0.5") it is taking the Pitch value as "0.5 mm" and converting the value to inches (Refer below image). The same issue is also there for the Depth parameter. Due to this, the Bolt thread creation is failed. WORKAROUND: As a workaround, in the Pitch and depth parameters of bolt thread creation, kindly provide the units along with the value. That is, instead of giving "0.5" as the value of Pitch, enter the value as "0.5 in". In this case, the value will not be further converted and bolt thread creation will work on the model. Let me know if you face any issues. Regards, Sivasankar.
  13. Hi Darad, Regrets for causing inconvenience. There is an issue in the Bolt thread creation. ISSUE: When IPS units is set and in the Bolt thread creation, when the Pitch value is given (say "0.5") it is taking the Pitch value as "0.5 mm" and converting the value to inches (Refer below image). The same issue is also there for the Depth parameter. Due to this, the Bolt thread creation is failed. WORKAROUND: As a workaround, in the Pitch and depth parameters of bolt thread creation, kindly provide the units along with the value. That is, instead of giving "0.5" as the value of Pitch, enter the value as "0.5 in". In this case, the value will not be further converted and bolt thread creation will work on the model. Let me know if you face any issues. Regards, Sivasankar.
  14. Hello, i am using HyperView 2019.1. When i try to visualise the displacements in my simulation via "Contour -> Result type: Displacement -> Apply" i can't see the corresponding legend. The same problem applies when visualising the stress or strain. In preceding versions of HyperView this was not a problem. So i hope someone can help me "turn on" the legend. Thanks!
  15. Sorry there is one more question. I found these warnings in the output file: WARNING 510: Imaginary part of the impedance is large thus the real part will be inaccurate WARNING 509: Reactive power large thus real power is inaccurate Do they have a big impact on the results? Is there anything I can do with them?
  16. May I ask how do you find those unaligned mesh? Or should I stitch all the faces together? Do I need to delete the edges? Moreover, I found that in POSTFEKO, the model will become cubical. Is this normal?
  17. 比較的簡単なスクリプトですが、指定した体積(Volume)以下の要素だけ表示するスクリプトを投稿します。 HM_GetElementsByVoume.tcl ※ダウンロードには、サインインが必要です。
  18. Yesterday
  19. @Abdessamed , Thank you very much for sharing the python script. I will explore it and learn from it. Thanks a lot for your kind help and support. Best Regards
  20. For further practice with bolted assemblies, a three-body STEP assembly was created for a Sprocket Drive in NX-IDEAS 6.1 (2004 version). This model is a spinoff of the Bolted Dome Assembly posted earlier. The slotted wheel section is a separate body, from the cylindrical section which is intended to be Joined to the wheel body. The sprocket and cylinder are adaptations of the dome and cylinder from the pressure box in earlier model, re-using bolt holes and pattern. For my simulation, the five mounting holes of the wheel were Constrained. A force of (6000, 4000, 0 lb) was applied at the fillet of one tooth as shown. The sprocket will be connected to the cylinder by 12 bolts. Your choice how to create. Manually create the flat spiders to washer faces (you create!), upward facing spiders near bottom of holes, and Bar elements connecting the spiders. Bolt Head creation, to automate creating the bolt head flat spider to washer face, and Bar element to the interface plane. Bolt Thread creation, to automate same for upward facing RBE2 and Bar element. I never succeeded getting this working, so they were easily created manually. Automated Bolt Head creation based on search of hole of size range, like the Altair demos, and same for Bolt Thread. Let me know if anyone gets the Bolt Thread feature to work, and how-to-do. I tried hard, and always failed with nothing displayed after the pop-up it had succeeded, and nothing new in the browser. Darryl Darryl SPROCKET_ASM.stp
  21. For practice with bolted assemblies, a simple three-body STEP assembly was created for a Dome Pressure Box. The base and cylinder are separate bodies. These can be Boolean or Join together for learning sake. Try the Boolean and learn to connect them as a single body with two volumes, and what that implies. Or Join the surface meshes and Remesh the interface, until a nice transition mesh is achieved. You may need to play with Mesh Controls on faces or edges for good transition. The domed body will be connected to the cylinder by 12 bolts. Your choice how to create. Manually create the flat spiders to washer faces (you create!), upward facing spiders near bottom of holes, and Bar elements connecting the spiders. Bolt Head creation, to automate creating the bolt head flat spider to washer face, and Bar element to the interface plane. Bolt Thread creation, to automate same for upward facing RBE2 and Bar element. I never succeeded getting this working, so quite easily created manually. Automated Bolt Head creation based on search of hole of size range, like the Altair demos, and same for Bolt Thread. Let me know if anyone gets the Bolt Thread feature to work, and how-to-do. I tried hard, and always failed with nothing displayed after the pop-up it had succeeded. The intention is to apply a 1500 psi internal pressure loading, e.g. a exploding device within, and compare stress contours in psi vis Simlab 2019.3. Bolts are 0.25" The solid assembly was quickly crafted in NX-IDEAS 6.1, with its superb and easy yet powerful modeler, but Windows updates may finally kill the great product. Darryl DOME_ASM.stp
  22. No, this isn't. 3d comps usually have free edges and you don't need to care about them. With 3d comps, you need to ensure no free faces, instead.
  23. For new users, here's a simple STEP assembly of a solid welded block, with a round bar the user can attached as desired. With just four bodies, this assembly is a good way to practice and add to your skills. They are simple enough to try different techniques joining the bodies, or even b oolean. Here's an image on my practice model. The loop weld is joined to the base, block joined to the weld, and solid rod joined by MPC connection. The block is not joined by mesh to the base, as in the real welded part. The resulting stresses are shown for the same h3d file, for 2019.3 (left) and 2019.2 (right). There appears to be some difference in how the stresses are displayed for the two versions, but the queried stress is the same. Enjoy, and share and teach your newbies. Darryl TEST_SOLID_WELDED_BLOCK.stp
  24. Last week
  25. Fady, I have had this issue before. I can usually fix it by deselecting and reselecting the check boxes under "define models". That is, DOE1 -> Definition -> Define Models. This will also make all the input variables as active, so if any of them were inactive, you will have to uncheck those boxes again. Hope this helps.
  26. Glad to help. You need to split the geometry into design & non-design components using geometry>solid edit>trim with nodes, lines or plane/surf. Solid_Edit_Panel.pdf
  27. Thank you @tinh your solution worked well! And thank you @alpha for alternative solution. I'm sorry just wanted to ask last question. After I adjusted my 2D mesh properly I had no free edges in my model. Then I used tetramesh tool to make 3D model out of 2D with regard to anchors. After that my 3D mesh had some free edges (red lines on a picture below). Those edges can't be fixed. Is this some kind of glitch of the program?
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